1 files changed, 185 insertions, 0 deletions
diff --git a/preview.go b/preview.go
new file mode 100644
index 0000000..6b0dd84
--- /dev/null
+++ b/preview.go
@@ -0,0 +1,185 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"html/template"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"log"
+	"runtime"
+	"sync"
+)
+
+type Image struct {
+	Name string
+	Filename string
+	Liked bool
+}
+
+var images []Image
+var currIndex int = 0
+var imagesPerPage int = 4
+
+func openbrowser(url string) {
+	var err error
+
+	switch runtime.GOOS {
+	case "linux":
+		err = exec.Command("xdg-open", url).Start()
+	case "windows":
+		err = exec.Command("rundll32", "url.dll,FileProtocolHandler", url).Start()
+	case "darwin":
+		err = exec.Command("open", url).Start()
+	default:
+		err = fmt.Errorf("unsupported platform")
+	}
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+
+
+var funcMap = template.FuncMap{
+    "minus": minus,
+}
+
+func minus(a, b int) string {
+    return strconv.FormatInt(int64(a-b), 10)
+}
+
+func main() {
+	jpgs_path := "jpgs"
+
+	http.HandleFunc("/", indexHandler)
+	http.HandleFunc("/select", likeHandler)
+	http.HandleFunc("/remove", removeHandler)
+	http.HandleFunc("/removefav", removeFavsHandler)
+	http.HandleFunc("/next", nextHandler)
+	http.HandleFunc("/prev", prevHandler)
+	http.HandleFunc("/favs", favsHandler)
+	http.HandleFunc("/jpgs/", serveImage)
+	http.Handle("/static/", http.FileServer(http.Dir(".")))
+
+
+	filepath.Walk(jpgs_path, func(path string, info os.FileInfo, err error) error {
+		if filepath.Ext(path) == ".jpg" || filepath.Ext(path) == ".JPG" {
+			base := filepath.Base(path)
+			name := base[:len(base)-len(filepath.Ext(base))]
+			images = append(images, Image{name, filepath.ToSlash(path), false})
+		}
+		return nil
+	})
+
+	var wg sync.WaitGroup
+	port := "42069"
+	fmt.Println("Serving on http://localhost:" + port)
+	wg.Add(1)
+	go http.ListenAndServe(":" + port, nil)
+	openbrowser("http://localhost:" + port)
+	wg.Wait()
+}
+
+func serveImage(w http.ResponseWriter, r *http.Request) {
+	filename := r.URL.Path[1:]
+	http.ServeFile(w, r, filename)
+}
+
+func indexHandler(w http.ResponseWriter, r *http.Request) {
+	tmpl, _ := template.ParseFiles("grid.html")
+	idx := r.URL.Query().Get("idx")
+	if len(idx) != 0 {
+		tmp, _ := strconv.Atoi(idx)
+		if tmp - 1 > len(images) {
+			currIndex = len(images) - 1
+		} else if tmp >= 1 {
+			currIndex = tmp - 1
+		} else {
+			currIndex = 0
+		}
+	}
+	name := r.URL.Query().Get("name")
+	if len(name) != 0 {
+		for idx, i := range images {
+			if (strings.Contains(i.Name, name)) {
+				currIndex = idx;
+				reload(w, r)
+				return
+			}
+		}
+	}
+	imagesToShow := images[currIndex:min(currIndex+imagesPerPage, len(images))]
+	err := tmpl.Execute(w, imagesToShow)
+	if err != nil { log.Fatal(err) }
+}
+
+func reload(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, "/?idx="+strconv.Itoa(currIndex + 1), http.StatusFound)
+}
+ 
+func likeHandler(w http.ResponseWriter, r *http.Request) {
+	visibleImages := images[currIndex:min(currIndex+imagesPerPage, len(images))]
+	index := r.URL.Query().Get("img_index")
+	i, _ := strconv.Atoi(index)
+	visibleImages[i].Liked = true
+	reload(w, r)
+}
+
+func removeHandler(w http.ResponseWriter, r *http.Request) {
+	visibleImages := images[currIndex:min(currIndex+imagesPerPage, len(images))]
+	index := r.URL.Query().Get("img_index")
+	i, _ := strconv.Atoi(index)
+	visibleImages[i].Liked = false
+	reload(w, r)
+}
+
+func nextHandler(w http.ResponseWriter, r *http.Request) {
+	currIndex += imagesPerPage
+	if currIndex >= len(images) {
+		currIndex = len(images) - imagesPerPage
+	}
+	reload(w, r)
+}
+
+func prevHandler(w http.ResponseWriter, r *http.Request) {
+	currIndex -= imagesPerPage
+	if currIndex < 0 {
+		currIndex = 0
+	}
+	reload(w, r)
+}
+
+func removeFavsHandler(w http.ResponseWriter, r *http.Request) {
+	filename := r.URL.Query().Get("filename")
+	for i := range images {
+		if images[i].Filename == filename {
+			images[i].Liked = false
+		}
+	}
+	http.Redirect(w, r, "/favs", http.StatusFound)
+}
+
+func favsHandler(w http.ResponseWriter, r *http.Request) {
+	tmpl, _ := template.New("favs.html").Funcs(funcMap).ParseFiles("favs.html")
+
+	var liked []Image
+
+	for _, i := range images {
+		if i.Liked {
+			liked = append(liked, i)
+		}
+	}
+	
+	err := 	tmpl.Execute(w, liked)
+	if err != nil { log.Fatal(err) }
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}